Hi
If you telnet to the Switch, and excute enable command, issue the flowwing commands:
2848#show ip
Say you have for Vlan1: 192.168.1.1 - 172.16.1.1 - 10.1.1.1
And you want to remove the last 2 IPs
2848#config
2848(config)#no vlan 1 ip 172.16.1.1
2848(config)#no vlan 1 ip 10.1.1.1
2848(config)#show ip
it should show you that Vlan1 has one IP which is 192.168.1.1
Good Luck !!!